Dropdown list is not sending value "Y" or "N" why?

Question

User-199788946 posted

public IEnumerable<SelectListItem> GetYesNoDropDown(object selectedValue)
{
return new List<SelectListItem>
{
new SelectListItem{ Text="Yes", Value = "Y", Selected = "Y" == selectedValue.ToString()},
new SelectListItem{ Text="No", Value = "N", Selected = "N" == selectedValue.ToString()},
};
}

var list = GetYesNoDropDown(user.IsActive); 
ViewData["yesnoList"] = list;

@Html.DropDownList("yesnoDropDown", ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

when I do 

I have model property IsActive How can I point to my model property from DropDownList,

when I do 

@Html.DropDownList(model=>model.IsActive,"yesnoDropDown", ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

intellisense is not showing my property IsActive and it is giving me error: 

Error CS1660 Cannot convert lambda expression to type 'string' because it is not a delegate type why?

I want to send selected property value IsActive to the server.

Answer 1

User-474980206 posted

Only the DropdownListFor accepts a delegate. Try

@Html.DropDownList(“IsActive”, ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

Answer 2

User-199788946 posted

Hello bruce,

IsActive is property in @model NicUserManagement.Models.ViewModel.User_TableVm it is not binding to model=>model.IsActive property. It is not even showing by IDE IntelliSense . I want to bind that property but in current context it is not doing that 

        public IEnumerable<SelectListItem> GetYesNoDropDown(object selectedValue)
        {
            return new List<SelectListItem>
                {
                    new SelectListItem{ Text="Yes", Value = "Y", Selected = "Y" == selectedValue.ToString()},
                    new SelectListItem{ Text="No", Value = "N", Selected = "N" == selectedValue.ToString()},
                };
        }
         void ActionResult Edit(int id){      
            var user = DBEntities.User_Table.FirstOrDefault(x => x.Id == Id);
            var list = GetYesNoDropDown(user.IsActive); 
            ViewData["yesnoList"] = list;
}
[HttpPost]
void AcitionResult Edit(User_TableVm uv){

}

@Html.DropDownList("yesnoDropDown", ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

when i write above code it is showing me dropdown when I press send button I want to bind property to the model. But problem is I am not able to bind property from my model

When I bind model to by viewmodel it gives me error also I can't able to receive value from GetYesNoDropDown method .

When i Press send button GetYesNoDropDown method Value property to IsActive property.

@Html.DropDownList(model=>model.IsActive,"yesnoDropDown", ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

Answer 3

User-474980206 posted

as I said, DropDownList does not take a lambda (delegate), it want the string name of the model property. if the property is IsActive, then its:

@Html.DropDownList("IsActive", ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

if you want intellisense, then use the DropDownListFor which was designed for intelligence (it call the above);

@Html.DropDownListFor(m=>m.IsActive, ViewData["yesnoList"] as List<SelectListItem>, new { @class = "form-control" })

Answer 4

User-199788946 posted

Thanks bruce for your time.